research centers


Search results: Found 2

Listing 1 - 2 of 2
Sort by

Article
Induced Buoyancy In Inclined Solar Chimney For Natural Ventilation

Authors: Zinah Jaber Khalaf --- Jalal M. Jalil
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2011 Volume: 29 Issue: 2 Pages: 183-194
Publisher: University of Technology الجامعة التكنولوجية

Loading...
Loading...
Abstract

A 2-D plane, steady, incompressible, turbulent flow field developed by naturalconvection inside inclined solar chimney at different inclination angles rangingfrom (30o to 90o), heat fluxes from (100 W/m² to 500 W/m²) and chimneythickness(0.1, 0.2 m) chimney is investigated numerically. It is found thatmaximum air temperature and maximum volume flow rate was 101.7oC, 306.3m³/h respectively at heat flux,500 W/m2; inclination angle; 90o and chimneythickness; 0.2m. Maximum outlet air velocity was 0.488 m/s at chimneythickness; 0.1m, heat flux; 500 W/m2; and inclination angle; 90o. Increase in heatflux, inclination angle and chimney thickness leads to increasing of volume flowrate. Increase in chimney cross-sectional area leads to decrease in air velocity andincrease in volume flow rate


Article
Transient Thermal Stress Prediction Due To Flow of Coolant Through Hot Pipe

Authors: Anes F. Saad --- Jalal M. Jalil
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2011 Volume: 29 Issue: 3 Pages: 423-433
Publisher: University of Technology الجامعة التكنولوجية

Loading...
Loading...
Abstract

Transient thermal stresses in pipe wall due to coolant turbulent flowthrough pipe are investigated in this study with transient isothermal hot boundaryin the external pipe radius. Three Different values of Reynolds are tested (3000,5000 and 8000). Finite volume method was used to calculate the velocities andtemperatures fields in the working fluid (air). Thermal resistance method was usedto calculate the transient temperature distribution in the pipe wall and then thetransient thermal stresses were calculated. Minimum thermal stress was locatednearly in the mid plane of the pipe.

Keywords

Listing 1 - 2 of 2
Sort by
Narrow your search

Resource type

article (2)


Language

English (2)


Year
From To Submit

2011 (2)